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A reference framework consisting of a set of points, lines, and/or surfaces, and a set of rules, used to define the positions of points in space in either two or three dimensions. This tag also refers to cartographic projections and coordinate system transformations.

2 votes

Re-projecting ground control points of similar images (Georeferencing in QGIS)

I learned that ArcGIS has a georeferencing feature called autoregistration that performs this task with some caveats. They say it does not work well in my use case of old scanned maps. QGIS has no si …
jbarlow's user avatar
  • 131
1 vote
1 answer
635 views

Re-projecting ground control points of similar images (Georeferencing in QGIS)

I have several maps to digitize. The base maps were Canadian NTS map sheets, all for more or less the same region. The useful information has been traced on top with handwritten markings. The maps wer …
jbarlow's user avatar
  • 131